说明：编辑环境是 QuartusII 5.0
问题现象：在这个编辑环境中仿真 波形正常，烧到芯片里后没有波形输出或波形异常。
设置说明：在Timing requirement and option 里设置Delay requirements 中分别设置TSU等4参数为空、1ns或10ns 烧入芯片后现象一样。
代码如下：LIBRARY ieee;
USE ieee.std_logic_1164.all;
USE ieee.std_logic_unsigned.all;
ENTITY CCD_DRIVER IS
PORT
( Rst:IN STD_LOGIC;
CLK8mHz: IN STD_LOGIC;
INT_ACK:IN STD_LOGIC;
SH:BUFFER STD_LOGIC;
TmpFre1:buffer std_logic_VECTOR(1 DOWNTO 0);
RS:BUFFER STD_LOGIC;
CP:BUFFER STD_LOGIC;
CR1:BUFFER STD_LOGIC;
CR2:BUFFER STD_LOGIC;
OE_CPU:IN STD_LOGIC;
WE_CPU:IN STD_LOGIC;
ADC_INT:BUFFER STD_LOGIC;
WE_SRAM:BUFFER STD_LOGIC;
RD_SRAM:OUT STD_LOGIC;
ADC_CLK:BUFFER STD_LOGIC;
TmpCLK: BUFFER STD_LOGIC;
ADC_OE:OUT STD_LOGIC;
ADD_ADC:BUFFER STD_LOGIC_VECTOR(12 DOWNTO 0);
ADD_CPU:IN STD_LOGIC_VECTOR(12 DOWNTO 0)--;
);
END CCD_DRIVER;
ARCHITECTURE ART OF CCD_DRIVER IS
signal TmpFre2: INTEGER RANGE 0 TO 8388;
signal Tmpwe:std_logic_vector(2 downto 0);
SIGNAL TemClkTest: STD_LOGIC_VECTOR(2 DOWNTO 0);
BEGIN
A: PROCESS(Rst,CLK8mHz,INT_ACK,OE_CPU,WE_CPU)
BEGIN
IF(Rst='0') then
TmpFre1<="00";
TmpFre2<=0;
ElSIF (CLK8mHz'EVENT AND CLK8mHz='1') THEN
IF(INT_ACK='0') THEN
IF TmpFre1="00" THEN
TmpFre1<="11";
ELSE
TmpFre1<=TmpFre1-'1';
END IF;
ADC_CLK<=TmpFre1(1);
IF (TmpFre2=8388) THEN
TmpFre2<=0;
ELSE
TmpFre2<=TmpFre2+1;
END IF;
RD_SRAM<='1';
ADC_OE<='0';
IF 4<=TmpFre2 AND TmpFre2<20 THEN
SH<='1';
ELSIF (TmpFre2<=8388) THEN
SH<='0';
END IF;
IF 0<=TmpFre2 AND TmpFre2<=20 THEN
CR1<='1';
CR2<='0';
RS<='0';
CP<='0';
ELSIF (TmpFre2<=8388) THEN
CR1<= NOT(TmpFre1(1) XOR TmpFre1(0));
CR2<= (TmpFre1(1) XOR TmpFre1(0));
RS<=TmpFre1(1) AND TmpFre1(0);
CP<=TmpFre1(1) AND TmpFre1(0);
ELSE
CR1<='1';
CR2<='0';
RS<='0';
CP<='0';
END IF;
IF (158<=TmpFre2 AND TmpFre2<=8350) THEN
WE_SRAM<=NOT CP;
ELSE
WE_SRAM<='1';
END IF;
TmpCLK<=CP OR WE_SRAM;
ELSE
SH<='0';
CR1<='0';
CR2<='0';
RS<='0';
CP<='0';
RD_SRAM<=OE_CPU;
ADC_OE<='1';
WE_SRAM<=WE_CPU;
END IF;
END IF;
END PROCESS A;
B:
PROCESS(ADC_CLK,TemClkTest,TmpCLK,INT_ACK,ADD_CPU)
BEGIN
IF (INT_ACK='0') THEN
IF (TmpCLK'EVENT AND TmpCLK='1') THEN
IF (ADD_ADC="1111111111111") THEN
ADD_ADC<="0000000000000";
ADC_INT<='1';
ELSE
ADD_ADC<=ADD_ADC+'1';
ADC_INT<='0';
END IF;
END IF;
ELSE
ADD_ADC<=ADD_CPU;
ADC_INT<='0';
END IF;
END PROCESS B;
END ART;
哪路高手帮我看看问题出在哪？
谢谢 |
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